Disruptable adhesive layer for fluid activated debonding

Abstract

Various systems, methods and materials are disclosed that enable efficient delivery of an agent into an adhesively adhered article, in which the agent elicits a desired outcome, on demand. This strategy, though general in scope, is also more specifically described with regard to enabling painless or atraumatic removal of products adhering to mammalian tissues such as skin and hair by suitably exploiting the ingress of an appropriate agent or like fluid. Other techniques and articles that aid in the handling or removal of such adhesive products are also disclosed.

What is claimed is: 
     
       1. A multitopographic adhesive assembly adapted for selective debonding from a substrate upon contact with a fluid debonding agent, the adhesive assembly comprising:
 a facestock; 
 a layer of a first adhesive disposed adjacent to the facestock; 
 a layer of a second adhesive defining an underside adherable to a substrate, 
 wherein the first adhesive is insoluble in the fluid debonding agent, and the second adhesive is highly soluble or swellable in the fluid debonding agent; and 
 wherein the layer of the second adhesive defines a plurality of flow channels. 
 
     
     
       2. The multitopographic adhesive assembly of  claim 1  wherein the layer of the first adhesive and the layer of the second adhesive are in contact with one another. 
     
     
       3. The multitopographic adhesive of  claim 1  wherein the layer of the first adhesive is disposed between the facestock and the layer of the second adhesive. 
     
     
       4. The multitopographic adhesive assembly of  claim 1  further comprising:
 a release liner disposed along and in contact with the underside of the layer of the second adhesive. 
 
     
     
       5. The multitopographic adhesive assembly of  claim 1  wherein the second adhesive is less than 30% crosslinked. 
     
     
       6. The multitopographic adhesive assembly of  claim 5  wherein the second adhesive is less than 20% crosslinked. 
     
     
       7. The multitopographic adhesive assembly of  claim 6  wherein the second adhesive is less than 10% crosslinked. 
     
     
       8. The multitopographic adhesive assembly of  claim 7  wherein the second adhesive is less than 1% crosslinked. 
     
     
       9. The multitopographic adhesive assembly of  claim 1  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent in less than 1 hour. 
     
     
       10. The multitopographic adhesive assembly of  claim 9  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent in less than 10 minutes. 
     
     
       11. The multitopographic adhesive assembly of  claim 10  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent in less than 1 minute. 
     
     
       12. The multitopographic adhesive assembly of  claim 11  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent immediately or substantially so. 
     
     
       13. The multitopographic adhesive assembly of  claim 1  wherein the first adhesive is selected from the group consisting of an acrylic adhesive, a rubber adhesive, a hydrocolloid adhesive, and combinations thereof. 
     
     
       14. The multitopographic adhesive assembly of  claim 1  wherein the second adhesive is selected from the group consisting of a silicone adhesive, a silicone gel adhesive, a silicone hybrid adhesive, a hydrogel adhesive, a water-based adhesive, and combinations thereof. 
     
     
       15. The multitopographic adhesive assembly of  claim 1  wherein the first adhesive is an acrylic adhesive and the second adhesive is a silicone adhesive. 
     
     
       16. The multitopographic adhesive assembly of  claim 1  wherein the first adhesive is a rubber adhesive and the second adhesive is a silicone gel adhesive. 
     
     
       17. The multitopographic adhesive assembly of  claim 1  wherein the first adhesive is an acrylic adhesive and the second adhesive is a hydrogel adhesive. 
     
     
       18. The multitopographic adhesive assembly of  claim 1  wherein the first adhesive is a rubber adhesive and the second adhesive is a hydrocolloid adhesive. 
     
     
       19. The multitopographic adhesive assembly of  claim 18  defining at least one edge region, wherein the plurality of flow channels defined by the layer of the second adhesive are accessible along the at least one edge region. 
     
     
       20. The multitopographic adhesive assembly of  claim 1  wherein the first adhesive exhibits a first solubility parameter and the second adhesive exhibits a second solubility parameter, wherein the difference between the first solubility parameter and the second solubility parameter is at least 1.0 MPa 1/2 . 
     
     
       21. The multitopographic adhesive assembly of  claim 20  wherein the difference between the first solubility parameter and the second solubility parameter is at least 1.5 MPa 1/2 . 
     
     
       22. The multitopographic adhesive assembly of  claim 21  wherein the difference between the first solubility parameter and the second solubility parameter is at least 2.0 MPa 1/2 . 
     
     
       23. A system for selectively debonding from a substrate, the system comprising:
 a multitopographic adhesive assembly including 
 a facestock; 
 a layer of a first adhesive disposed adjacent to the facestock; and 
 a layer of a second adhesive defining an underside for contacting the substrate; and 
 a fluid debonding agent; 
 wherein the first adhesive is insoluble in the fluid debonding agent, and the second adhesive is highly soluble or swellable in the fluid debonding agent. 
 
     
     
       24. The system of  claim 23  wherein the layer of the first adhesive and the layer of the second adhesive are in contact with one another. 
     
     
       25. The system of  claim 23  wherein the layer of the first adhesive is disposed between the facestock and the layer of the second adhesive. 
     
     
       26. The system of  claim 23  further comprising:
 a release liner disposed along and in contact with the underside of the layer of the second adhesive. 
 
     
     
       27. The system of  claim 23  wherein the second adhesive is less than 30% crosslinked. 
     
     
       28. The system of  claim 27  wherein the second adhesive is less than 20% crosslinked. 
     
     
       29. The system of  claim 28  wherein the second adhesive is less than 10% crosslinked. 
     
     
       30. The system of  claim 29  wherein the second adhesive is less than 1% crosslinked. 
     
     
       31. The system of  claim 23  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent in less than 1 hour. 
     
     
       32. The system of  claim 31  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent in less than 10 minutes. 
     
     
       33. The system of  claim 32  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent in less than 1 minute. 
     
     
       34. The system of  claim 33  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent immediately or substantially so. 
     
     
       35. The system of  claim 23  wherein the first adhesive is selected from the group consisting of an acrylic adhesive, a rubber adhesive, a hydrocolloid adhesive, and combinations thereof. 
     
     
       36. The system of  claim 23  wherein the second adhesive is selected from the group consisting of a silicone adhesive, a silicone gel adhesive, a hydrogel adhesive, a water-based adhesive, and combinations thereof. 
     
     
       37. The system of  claim 23  wherein the first adhesive is an acrylic adhesive and the second adhesive is a silicone adhesive. 
     
     
       38. The system of  claim 23  wherein the first adhesive is a rubber adhesive and the second adhesive is a silicone gel adhesive. 
     
     
       39. The system of  claim 23  wherein the first adhesive is an acrylic adhesive and the second adhesive is a hydrogel adhesive. 
     
     
       40. The system of  claim 23  wherein the first adhesive is a rubber adhesive and the second adhesive is hydrocolloid adhesive. 
     
     
       41. The system of  claim 23  wherein the layer of the second adhesive defines a plurality of flow channels. 
     
     
       42. The system of  claim 41  defining at least one edge region, wherein the plurality of flow channels defined in the layer of the second adhesive are accessible along the at least one edge region. 
     
     
       43. The system of  claim 23  wherein the first adhesive exhibits a first solubility parameter and the second adhesive exhibits a second solubility parameter, wherein the difference between the first solubility parameter and the second solubility parameter is at least 1.0 MPa 1/2 . 
     
     
       44. The system of  claim 43  wherein the difference between the first solubility parameter and the second solubility parameter is at least 1.5 MPa 1/2 . 
     
     
       45. The system of  claim 44  wherein the difference between the first solubility parameter and the second solubility parameter is at least 2.0 MPa 1/2 . 
     
     
       46. A method for selectively debonding an adhesive assembly adhered to a substrate by use of a fluid agent, the method comprising:
 providing a multitopographic adhesive assembly adhered to a substrate, the multitopographic adhesive assembly including a facestock, a layer of a first adhesive disposed adjacent to the facestock, and a layer of a second adhesive defining an underside which is in contact with the substrate, wherein the first adhesive is insoluble in the fluid agent, and the second adhesive is highly soluble or swellable in the fluid agent; 
 administering an effective amount of the fluid agent to the layer of the second adhesive, whereby debonding occurs between the second adhesive and the substrate thereby debonding the adhesive assembly from the substrate. 
 
     
     
       47. The method of  claim 46  wherein the fluid agent is administered along at least a portion of an edge of the layer of the second adhesive. 
     
     
       48. The method of  claim 46  wherein the second adhesive is less than 30% crosslinked. 
     
     
       49. The method of  claim 48  wherein the second adhesive is less than 20% crosslinked. 
     
     
       50. The method of  claim 49  wherein the second adhesive is less than 10% crosslinked. 
     
     
       51. The method of  claim 50  wherein the second adhesive is less than 1% crosslinked. 
     
     
       52. The method of  claim 46  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent in less than 1 hour. 
     
     
       53. The method of  claim 52  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent in less than 10 minutes. 
     
     
       54. The method of  claim 53  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent in less than 1 minute. 
     
     
       55. The method of  claim 54  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent immediately or substantially so. 
     
     
       56. The method of  claim 46  wherein the first adhesive is selected from the group consisting of an acrylic adhesive, a rubber adhesive, a hydrocolloid adhesive, and combinations thereof. 
     
     
       57. The method of  claim 46  wherein the second adhesive is selected from the group consisting of a silicone adhesive, a silicone gel adhesive, a silicone hybrid adhesive, a hydrogel adhesive, a water-based adhesive, and combinations thereof. 
     
     
       58. The method of  claim 46  wherein the first adhesive is an acrylic adhesive and the second adhesive is a silicone adhesive. 
     
     
       59. The method of  claim 46  wherein the first adhesive is a rubber adhesive and the second adhesive is a silicone gel adhesive. 
     
     
       60. The method of  claim 46  wherein the first adhesive is an acrylic adhesive and the second adhesive is a hydrogel adhesive. 
     
     
       61. The method of  claim 46  wherein the first adhesive is a rubber adhesive and the second adhesive is hydrocolloid adhesive. 
     
     
       62. The method of  claim 46  wherein the layer of the second adhesive defines a plurality of flow channels. 
     
     
       63. The method of  claim 62  defining at least one edge region, wherein the plurality of flow channels defined in the layer of the second adhesive are accessible along the at least one edge region. 
     
     
       64. The method of  claim 46  wherein the first adhesive exhibits a first solubility parameter and the second adhesive exhibits a second solubility parameter, wherein the difference between the first solubility parameter and the second solubility parameter is at least 1.0 MPa 1/2 . 
     
     
       65. The method of  claim 64  wherein the difference between the first solubility parameter and the second solubility parameter is at least 1.5 MPa 1/2 . 
     
     
       66. The method of  claim 65  wherein the difference between the first solubility parameter and the second solubility parameter is at least 2.0 MPa 1/2 . 
     
     
       67. A method for bonding an adhesive assembly to a substrate and subsequently selectively debonding the adhesive assembly from the substrate, the method comprising:
 providing a multitopographic adhesive assembly including a facestock, a layer of a first adhesive disposed adjacent to the facestock, a layer of a second adhesive defining an underside, and a release liner contacting the underside of the second adhesive layer; 
 removing the release liner to thereby expose the underside of the layer of the second adhesive; 
 contacting the underside of the layer of the second adhesive to the substrate to thereby bond the multitopographic adhesive assembly to the substrate; 
 providing a fluid debonding agent, wherein the first adhesive is insoluble in the fluid debonding agent and the second adhesive is highly soluble or swellable in the fluid debonding agent; 
 administering an effective amount of the fluid debonding agent to the layer of the second adhesive whereby debonding occurs between the second adhesive and the substrate thereby debonding the multitopographic adhesive assembly from the substrate. 
 
     
     
       68. The method of  claim 67  wherein the fluid debonding agent is administered along at least a portion of an edge of the layer of the second adhesive. 
     
     
       69. The method of  claim 67  wherein the second adhesive is less than 30% crosslinked. 
     
     
       70. The method of  claim 69  wherein the second adhesive is less than 20% crosslinked. 
     
     
       71. The method of  claim 70  wherein the second adhesive is less than 10% crosslinked. 
     
     
       72. The method of  claim 71  wherein the second adhesive is less than 1% crosslinked. 
     
     
       73. The method of  claim 67  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent in less than 1 hour. 
     
     
       74. The method of  claim 73  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent in less than 10 minutes. 
     
     
       75. The method of  claim 74  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent in less than 1 minute. 
     
     
       76. The method of  claim 75  wherein the second adhesive can dissolve into a single-phase solution of the fluid debonding agent immediately or substantially so. 
     
     
       77. The method of  claim 67  wherein the first adhesive is selected from the group consisting of an acrylic adhesive, a rubber adhesive, a hydrocolloid adhesive, and combinations thereof. 
     
     
       78. The method of  claim 67  wherein the second adhesive is selected from the group consisting of a silicone adhesive, a silicone gel adhesive, a silicone hybrid adhesive, a hydrogel adhesive, a water-based adhesive, and combinations thereof. 
     
     
       79. The method of  claim 67  wherein the first adhesive is an acrylic adhesive and the second adhesive is a silicone adhesive. 
     
     
       80. The method of  claim 67  wherein the first adhesive is a rubber adhesive and the second adhesive is a silicone gel adhesive. 
     
     
       81. The method of  claim 67  wherein the first adhesive is an acrylic adhesive and the second adhesive is a hydrogel adhesive. 
     
     
       82. The method of  claim 67  wherein the first adhesive is a rubber adhesive and the second adhesive is a hydrocolloid adhesive. 
     
     
       83. The method of  claim 67  wherein the layer of the second adhesive defines a plurality of flow channels. 
     
     
       84. The method of  claim 83  defining at least one edge region, wherein the plurality of flow channels defined in the layer of the second adhesive are accessible along the at least one edge region. 
     
     
       85. The method of  claim 67  wherein the first adhesive exhibits a first solubility parameter and the second adhesive exhibits a second solubility parameter, wherein the difference between the first solubility parameter and the second solubility parameter is at least 1.0 MPa 1/2 . 
     
     
       86. The method of  claim 85  wherein the difference between the first solubility parameter and the second solubility parameter is at least 1.5 MPa 1/2 . 
     
     
       87. The method of  claim 86  wherein the difference between the first solubility parameter and the second solubility parameter is at least 2.0 MPa 1/2 .